Method and device for wireless communications on multiple frequency bands

• US 20070281634A1
• Filed: 06/06/2006
• Published: 12/06/2007
• Est. Priority Date: 06/06/2006
• Status: Abandoned Application

• Current Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Original Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Inventors: Majumder, Darpan, Rao, Surya Prashant
• Application Number:
  US11/447,578
• Publication Number:
  US 20070281634A1
• Time in Patent Office: Days
• US Class Current: 455/103
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning

Abstract

Described is a method and device for wireless communications on multiple frequency bands. The device comprises a communications arrangement and a processor. The communications arrangement receives radio frequency (RF) maps from a plurality of wireless communication devices. The RF maps are indicative of wireless activity in respective environments of the plurality of wireless devices. The processor generates a frequency band hopping sequence as a function of the RF maps. The frequency band hopping sequence is transmitted to the plurality of devices.

Claims

1. A device, comprising:

a communications arrangement receiving radio frequency (RF) maps from a plurality of wireless communication devices, the RF maps indicative of wireless activity in respective environments of the plurality of wireless devices; and

a processor generating a frequency band hopping sequence as a function of the RF maps and transmitting the frequency band hopping sequence to the plurality of devices.

2. The device according to claim 1, wherein the device is one of a switch, an access point, a router, a hub and a bridge.

3. The device according to claim 1, wherein the frequency band hopping sequence instructs a first set of the plurality of devices to communicate with an access point on a first frequency band during a first time period and instructs a second set of the plurality of devices to communicate with the access point on a second frequency band during the first time period.

4. The device according to claim 3, wherein the first frequency band is a 2.4 GHz band and the second frequency band is a 5.1 GHz band.

5. The device according to claim 3, wherein the first set and the second set include mobile communication units which include at least one of image-based scanners, laser-based scanners, RFID readers, PDAs, mobile phones, network interface cards, laptops and tablets.

6. The device according to claim 5, wherein the frequency band hopping sequence is transmitted from the device to the access point and the access point transmits the band hopping sequence to the mobile communication units in a beacon frame.

7. The device according to claim 1, wherein the plurality of devices generate the RF maps by scanning through a plurality of radio frequency channels and detecting wireless activity on each of the radio frequency channels.

8. The device according to claim 3, wherein the access point utilizes a first transceiver to communicate on the first frequency band and a second transceiver to communicate on the second frequency band.

9. The device according to claim 8, wherein the first and second transceivers utilize a single basic service set identifier.

10. The device according to claim 3, wherein the first frequency band supports a first wireless communication protocol and the second frequency band supports a second wireless communication protocol.

11. The device according to claim 10, wherein the first wireless communication protocol is an 802.11a protocol and the second wireless communication protocol is one of an 802.11b protocol and an 802.11g protocol.

12. The device according to claim 3, wherein each of the first and second mobile units includes a radio transceiver for alternately communicating on the first and second frequency bands.

13. The device according to claim 12, wherein the radio transceiver supports a plurality of wireless communication protocols.

14. A device, comprising:

a first transceiver communicating on a first radio frequency band;

a second transceiver communicating on a second radio frequency band; and

a processor receiving an instruction to generate a radio frequency (RF) map indicative of wireless activity in a surrounding environment, the processor scanning the first and second transceivers through a plurality of radio frequency channels to detect wireless activity on each of the channels for each of the first and second radio frequency bands, the processor generating the RF map as a function of the detected wireless activity and transmitting the RF map to a network management arrangement.

15. The device according to claim 14, wherein, after transmitting the RF map to the network management arrangement, the device receives a frequency band hopping sequence from the network management arrangement and operates the first and second transceivers as a function thereof, the frequency band hopping sequence instructing the device to communicate with a first set of mobile communication units on the first frequency band during a first time period and a second set of mobile communication units on the second frequency band during the first time period.

16. The device according to claim 14, wherein the first frequency band is a 2.4 GHz band and the second frequency band is a 5.1 GHZ band.

17. The device according to claim 14, wherein the device is an access point.

18. The device according to claim 15, wherein the device transmits the frequency band hopping sequence to the first and second sets of mobile communication units in at least one beacon frame.

19. A method, comprising:

receiving radio frequency (RF) maps from a plurality of wireless communication devices, the RF maps indicative of wireless activity in respective environments of the plurality of wireless devices;

generating a frequency band hopping sequence as a function of the RF maps; and

transmitting the frequency band hopping sequence to the plurality of devices.

20. The method according to claim 19, further comprising:

obtaining wireless communication capability information about each of the plurality of devices; and

adjusting the frequency band hopping sequence as a function of the information.

21. The method according to claim 19, wherein the information is indicative of at least one wireless communication protocol supported by a corresponding device.

22. The method according to claim 19, wherein the plurality of devices include at least one access point and a plurality of mobile communication units.

23. A device, comprising:

a receiving means for receiving radio frequency (RF) maps from a plurality of wireless communication devices, the RF maps indicative of wireless activity in respective environments of the plurality of wireless devices;

a processing means for generating a frequency band hopping sequence as a function of the RF maps; and

a transmitting means for transmitting the frequency band hopping sequence to the plurality of devices.